Newsletter  2021.4  Index

Theme : "The Conference of Fluid Engineering Division (April issue)” Preface （T. Hashimoto，S. Matsuda，H.J. Park） Backflow of Liquid Crystal and Development of Microactuators Driven by Backflow Effect Shigeomi CHONO, Tomohiro TSUJI (Kochi University of Technology) Is viscoelasticity of non-Newtonian fluids influenced by dispersion condition of particles? Taiki YOSHIDA, Yuji TASAKA and Yuichi MURAI (Hokkaido University) Development of micro-droplets generation method using flow-focusing device Hiroko SHIOZAKI, Yuki FUJIWARA, Ikuya KINEFUCHI, Mitsuhisa ICHIYANAGI, Yoshiyuki TAGAWA and  Shu TAKAGI (University of Tokyo) The Dream of Flow Contest Hiroaki OHASHI, Ryunosuke OSAKA, Kaito MORIMO and Fumiya TAKEUCHI (Setsunan University)

 

Development of micro-droplets generation method using flow-focusing device

Hiroaki OHASHI, Ryunosuke OSAKA, Kaito MORIMO and Fumiya TAKEUCHI (Setsunan University)

Abstract

We participated in "The 18th Flow Dream Contest" of which the theme is to make a toy using flow. Our concept of the toy adopted is not only to play with flow but to learn the hydrodynamics and to relax our mind. To do so, we select a mobile, as the toy, which is usually hung from a ceiling and wafting in the air. The present mobile is drifting in a vertically-placed rectangular narrow water channel made of transparent acrylic resin (Fig.1). The uniform water flow in the channel is supplied from a pump through a chamber to straighten the flow. We can observe a dancing object (Fig.2) due to a flow in a channel. Changing the geometry of the objects, appearance of the dancing is quite different (Movie.1,2).

Key words

Flow, Hydrodynamics, Mobile

Figures

Fig.1 Water tank

Fig.2 Mobiles

Movie.1 Demonstration1

Movie.2 Demonstration2